Shopping for a Prom Dress

I’m starting to look for prom dresses but I’m having trouble finding one that I think would work for me, so I was wondering if anyone had any ideas of a good style for me. I’m about 5’5, 105 lbs, and a small bust so I don’t want to go strapless but I still want to stay with the current fashion trends. I’m really looking for a long, elegant dress but I’m not exactly sure which way to go and in what color. I have dark brown hair and brown eyes. Any ideas or good websites?